Cap for electric-circuit interrupters.



W. H. BROWN.

CAP FOR ELECTRIC CIRCUIT INTERRUPTERS.

APPLICATION FILED JULY 29. I915. 1,177,923. Patented Apr. 4,1910.

2 Q e .g

F/GZE. A

5 "VT/V566. L //VVE/Y70F hg dm lyflfown:

flrromVsK UNITED STATES PATENT OFFICE.

WILLIAM H. BROWN, OF PHILADELPHIA. PENNSYLVANIA, ASSIGNOR TO PHILIPS- BRINTON COMPANY, OF KENNETT SQUARE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CAP FOR ELECTRIC-CIRCUIT INTERRUPTERS.

Application filed July 29, 1915.

To all whom it may concern:

Be it known that I. \VILLLUI H. BRowX. a citizen of the l'nited States. residing at Philadelphia. county of Philadelphia, and

State of l'ennsvlvania. have invented a new and useful Improvement in (aps for Electric-(ircuit lnterrupters. of which the following is a full. clear. and exact description, reference being bad to the accompanying drawings. which form a part of this specification.

The object of my invention is to provide an improved means for holding in place the removable cap inclosing the devices for effecting the make and break of the electric circuits in a single spark ignition system for gas-driven automobiles. It is essential that this cap, which carries the central terminal post and the binding posts, should be held securely in position and at the same time be readily detachable and replaceable. My improvement is designed and adapted to perform this function.

In the drawings, which show a preferred embodiment of my invention,Figure 1 is a plan view of the cap. Fig. 2 is a vertical sectional view of the cap applied to the base or table. Fig. 3 is a side view of the cap.

The base or table I), (which may be made hollow to inclose a condenser chamber) affords a bearing for the cam-shaft or timershaft (not shown) which extends centrally through and up above the table and carries a head 0 of insulating material to which is secured the distributer conductor plate d. The cap a, which is also of insulating material. fits upon the base b and incloses the head 0 and distributer plate (I an'd'the contact devices (not shown) for making and breaking the primary circuit. and carries the common terminal post 6 and the binding posts 1, 2, 3 and 4; the secondary circuit bemg closed successively through the several binding posts as the shaft revolves, in a manner well known in the art.

At each of two opposite points in the periphery of the cap (1 its outer wall is grooved vertically at f to receive a holding lever g. This lever is pivoted between its ends upon Specification of Letters Patent;

v Patented Apr; 4, 1916.

SerialNo. 42,572.

an axis extending between the side Walls of the groove. The upper end of the lever and the opposite wall of the base of the groove are recessed to receive a coiled spring h tending to hold the upper end of the lever out and its lower end in. The lower end of the lever has an inwardly projecting toe piece affording an inclined shoulder adapted to engage the similarly inclined under side of a ledge i on the table 7). The top of the table is cut away throughout its periphery to fit the stepped contour of the lower face of the wall of the cap. The cap is orificed at l to engage a member m fixed relatively to thetable, whereby-the ap is held from turnlng.

When the cap a is applied to the table 6, its orifice iv is alined with the member m and the cap is then pressed down until the toe pieces of lQVGI'Sf/Sllill) under the ledge '5, thereby properly positioning the cap and also holding it in place on the table. No jar or -vibration can loosen the cap and it cannot be removed by an upward pull unless the upper ends of the levers are first pressed in. The manipulation of the levers, however, is a very simple matterso simple, in fact, that the operator, using only one hand, can remove the cap in -an instant of time and replace it with almost equal celerity.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. A removable cap for inelosing electric circuit making and breaking devices comprising a. table, a ledge thereon, a cap, a lever-pivoted between its ends on the cap on a fixed axis, a toe piece integral with the lever on the lower end thereof and adapted to engage the under face of the ledge, and a spring normally pressing out the upper end of the lever so that inward pressure on the upper end of the lever withdraws the hooked end of the lever from engagement with the cap.

2. A removable cap for inclosing electric circuit making and breaking devices comprising a table, a ledge thereon, a cap, a

lever pivoted between its ends on the cap on a fixed axis and partly inset in the outer wall thereof, a toe piece integral with the lever on the lower end thereof and adapted to engage the under face of the ledge, and a spring normally pressing out the upper end of the lever beyond the outer wall of the cap so that inward pressure on the upper WILLIAM H. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

